Smoke-consuming furnace.



'0. D. ORVIS.

SMOKE CONSUMING FURNACE,

APPLICATION run my 1, 1909.

1,000,191 Patentd Aug. 8, 1911. I

ORLAND I). ORVIS, OF NEW YORK, N. Y.

SMOKE-CONSUMING FURNACE.

Specification of Letters Patent.

1 ,ooo,191.

Patented ru s;- 1911.

Application filed May 1, 1909. Serial No. 493,283.

To all whom it may concern:

Be it known that I, OnLANn I). OnvIs, a citizen of the United States, residing in the city of New York, borough of'Manhattan, 5 county of New York, and State of New York, have invented a certain new and useful Snwoke-Consuming Furnace, of which the following is a specification.

, This invention is a steam boiler furnace wherein a blast of-airand steam is directed into the products of combustion for the purpose of consuming the carbon in the smoke, increasing the draft, and generating increased heat, thereby securing economy by 5 thorough consun'iption of the coal and overcoming the serious objection of municipalities to the so-called smoke nuisance, besides affording facilities for clearing out the clinkers and other objectionable matter in 0 the bed of fuel and upon the breast of the bridge wall.

The objects of the invention are, first, to incasc a pipe With a view to precluding it from rapid "deterioration under the intense heat generated in the furnaceyand second, to so arrange the arch with reference to the bridge wall that the dust will be carried off by the escaping gases and the fire can be raked Without obstruction by said pipe incasin'g means.

To the accomplishment of this end, one part of the invention consists of an arch composed of sections which may be easily installed, cheaply manufactured, and adapted to be used in furnace chambers, the width of whichniay vary from side wall to side wall thereof. a

prises two end members, the terminal ortions of which are at an angle to each at lcr,

)referably a rightan'gle, and other sections intermediatethe end sections, said sections having interlocking engagement.

' An arch such as described is adapted to bc installed easily and quickly in an ordinary 'furnace chamber, and by the employment of intermediate sections which are different in le1.gth',.the'arch maybe built ion or or shorterto accommodate chambers ofdifferent Widths. "It is' 'preferred to provide matching or registering-grooves in the-sections-composin th' e -arch, for thcpurpose of producinga c aniber adapted to receive a pipe, such as "a' blast pipe adapted to supply steam and with one or more In a preferred form of the arch, it com- .usual or any preferred way,

air to the. products of combustion. Obviously, however, the arch may be equipped water circulating pipes. Another part of my invention com rises a brid e wall havingaconeave breast ibrming, a .roximately,acontinuation of the uppcrsurface of the grate, and in arran ing the arch directly over the breast, the rout surface of the arch being in the vertical plane, substantially, of thefront edge of the curved breast. The lower edge of the arch is, or may be, curvodoorrespondin-gly to the contour of the breast, and e throator passage is thus formed betweenthebreast and, arch for the escape of the'products of combastion. By placing the archdirectly over the breast, and by curving oi inclining the breast of the bridge wall, thefi'rcman is able to clean the furnace Without hindrance from the arch, and to rake off the "coals from the breast, the draft through the -thrii attending to carry off any ashes or dust tighich might otherwise tend to lodge thereon, In. the accompanying drawings I have llustrated a practical embodiment of the nvention, but the construction 'sliown therein to be understood as illustrative only, and not as defining the limits of th' invention. Ifigure 1 is a vertical section taken longitudinally through a part of a return tubular boiler, the furnace of which is constructed in accordance with my invention. 33 is a vertical cross section on the lin' QQ-f Xiof Fig. 1, parts of the arch and the blast pipe being broken away. i T-'.- A, designates a furnace chamber, the-side walls thereof being indicated at afa' end the front wall at c r B, designates the grate of any usual or preferred construction which is su ported Within the furnace chamber, 6, indicafin the ash pit, access to which is obtaine through ash pit door opening bf. As is"- I usual, the furnace is charged through the fuel door openings, 6 r

The boiler, O, is set in the furnace'inthe' one seat,"c, .of, a 'plurality of boiler seats, 0, c, resting upon an arch, F, which is constructed in accordance with this invention.

The bri'd a wall E, is somewhat .wider than the bridge walls of ordinary furnaces, andcsaid brid e wall is constructed with the breast, Fifi", Vhile the breast may be insaid intermediate'sections being of diilcrent clincd from a point above the grate to the top edge of the bridge wall, it is preferred to employ a concave breast as slu'iwn in Fig. l. The breast may be composed of tire brick, fire clay, or fire clay tiles, a tile of. this character being shown in Fig. l. The cone-ye breast is so arranged that its lower front edge is above the horizontal plane of grate B, and the tiles, 0, composing the said breast are laid in a continuous row until they reach the top edge'of the bridge wall An important feature of my invention consists of arch, F, which extends across the furnace chamber and is positioned directly over thebreast of the bridge wall, the front surface of said arch bein in the vertical plane of the front edge oi breast, E, see Fig. 1. Said arch is composed of ter- .minal sections, F, F, and one or a plurality of intermediate sections, F. Each terminal section, F, is, preferably angular in form, consis ing of a depending portion, f, and a horizontal portion, f, it being preferred to make each terminal section of a right angular form along the top and outer thereof, see Fig. 2. In installing the arch in the furnace, side walls, a, a, are built so as'to form recesses, aiwhich form seats for the-terminal sections F,F,of the arch,

whereby said terminal sections are supported in a secure manner in the side walls of: the furnace chamber, the horizontal per tions, f, of each terminal section extending inwardly with respect to the side walls, a, Q.

Should the furnace be of narrow cross sec tion, I may employ a single intermediate section, F positioned between the end scctions, F, but as shown 1n Fig. 2 the arch 1S composed of three intermediate sections, F,

sizes. In order to retain the sections in po sition, and enable them' to be installed easily and quickly the intermediate-sections are interlocked with eachother and. with the end sections, and for this purpose it is pre ferred to provide each section with the groove, 9, and a, tongue, g. 'When the end s'eotio'ns shall havebeen placed into position inst-he seats of the sidewalls, the proper number.- and sizes of-i'nterrnediate sections are-placed in position, the tongue of one sec tionentering the groove in the othersec. .tion. The several. sections are thus'firmly interlocked, and the arch can be installed easilyfan d quickly, The employment of intermediate sections differing in length per mits the operator to install the arch with ense'and facility in furnace chambers which differ in width,

The-transverse part ofthe arch which extends overjtheconcave breast-is, preferably, curr ed or rounded in cross section-at 'the lower edge thereof as indicated at, 9 in Fig. 1. The said'cross sect-ionally curved edge conforms, substantially, to the contour of breast, ldfl and. thus the throat or passage, l, is produced between the arch and the breast. 'lhc trai'is'verse part oil the arch extends below the top edge cl bridge wall, F and the (-m-respolulinn edge oi breast, E, so that tlu escaping products of combustion will pass in an upwart l and rearward direc tion from the grate clmu'iber into and. tl'u'ough throat, I, and thence over the bridge wall. back into the tluc, J.

The arch is provided in its upper edge with a. chanl'iel, adapted to .it'orm a chamher for the rece ')tion of blast pipe, K. In its 1 ear side, said pipe rovi ed with a pluflt-ity of openings or nipples, in, and in the rear face of arch, F, is'a series of o.penlugs, it, which register'with the openings or nipples of the blast pipe. One end of said blast pipe extends preferably through a side wall of the furnace in order that it may be connected with an air inlet pipe, L, extending in a suitable direction from the blast.

pipe and provided, preferably, at its inlet end with a. .rnuiller, Z, see Fig. 2. A. steam nozzle, M, enters the blast pipe, K, at its outer expose-d end, and steam from the bpiler is supplied to said nozzle by a. steam pipe, m.

The operation of the invention as follows: The fire having been started, the operator admits steam to nozzle. M, and the velocity of the steam admitted to pipe, K, induces air to flow through niulllcr, Z, and pipe, L, intopipe, K. The steam and. blast coinmingle in the pipe and are delivered under pressure from the openings in the rear side of the pipe and the arch, the blasts flowing under pressure across the upper part of throat. I, overthe top edge of bridge wall. The blasts of steam and air are di-' rected into tihh escaping products of co.m

'the air'and other gases in the throat are rarefied, or as it mightbe termed a partial vacuum is produced thcreimlhe air and products of combustion being forcibly drawn round the lower-,edgc. of. the-arch, th ns securing the increased draft referred to. The blasts OI'KIlltG, furthermore, to draw the products of combustion forcibly into throat, I, so that they will impinge v upon the curved breast, E, which in a measure reflects the gases against the arch, F, from which the gases rebound. The arch and the breast being composed of'lire clay tiles, they will become-heated to white or red heat, and the gaseous products of combustion im pingmg against these heat ed surfaces, it follows that thorough combastion of the gases 'issecured, this resulting inan increased number of heat wits. "0n the; whole, the apparatus secures gneate'conomy in the consumption of fuel, Increases tlieheat as compared-with ordinary furnafies, and consumes thecarbon in the smoke 'so that the escaping gases are practically free from the'heavy' black color of the smoke from, ordinary furnaces.

From .the foregoing description taken inconnection with the drawings, it is apparent that my invention can be embodied in existing furnaces as well as newfurnaces. The breast of the bridge wallcan be built rapidly, and the arch may be installed with very little labor, it being necessary only to place the tile sections, F, F, in the re- ..quired positions. The blastpipe can be quickly placed into position and the neces.

.saryconnections made with said blast pipe. M new arch.-isplaced in such relation to the ridge wall that it overcomes the practical objections which have been raised by i. firemen.or stokers to other forms of arches which are placed in the furnacechamber in front of the bridge wall so that the old formof arches lay over the fuel on the 1 grate, said old position of the arches interfering with theoperation ofcleaning the grate. It will be. noted thgt'the'arch in my structure lies over the breast of the bridge walhthusleaving the entire'surfacc of the grate free from obstruction. Should the coal lodge upon the breast, the operator is able to rake it ofl and upon the grate. The

f-increaseddraft through throat, L secur'ed "by the operation of the blast pipe devices, precludesthe lodgment of ashes and dust upon the bridge wall, for the reason that.

said draft has sufiicient strength to carry ofi' the lighter, particlesof dust and ashes.

After the arch is placed into position, andthe blast pipe positioned within the cham her of said arch. it is preferred to employ meansfor upholding the tiles composing the arch. To this end I provide the end sections, F, with vertical openings, 11,

eifch opening being enlarged at its lower "end as a to; Bolts,JN, are secured in the under side of blast; pipe, K, and pass through opening a, so that the lower ends 1 thereof will enter in the enlarged ends, 11'.

of the o enings, the lower extremities of the bolts being'fabove the under face of the arch. fiwash'er n fitted; on each bolt for engagement with the arclrand two nuts, 11..

- n, are-screwed on the bolt. The nut, 12", engages with the washer, but-the other nut,

n, is-spaced with reference to the washer.

m -.The chamber formed by the enlarged part,

{iej'fllled with plastic meaty or other a ;p- 'ria'te material which will harden under tbe jaction of the heat, whereby the bolts .Iilihold the arch sections, from sagging and the pipe is protected from the heat, and

said bolts in turn serve to i reve'nt displacement of the blast pipe, the atter being protected from the heat bythe arch.

It may be desired to supply air to the products. of combustion as they flowupwa'rdly through throat, I, and in this event I prefer to employ a concave breast, E, which is provided with rows of erioi ations, e Said concave breast ma "e composed of one or more sections in or er that it may be roperly installed onthe bridge wall. Sa-id 'brid e wall is constructed with the air chamber, %E', back of the concavebreast, and with this chamber communicates the opm'ings, e", ofsaid breast, thereby providing for the outflow of atmospheric air through the breast and into the throat, I. 'Air may be 'slipplied in any suitable way to the chamber, but as shown in the drawin s, the bridge wallmay have its bricks, c d acent to the breast so arranged as to pro- .3 1y 'fe air ducts or channels, 6, which open thoroughly consuming the gaseous products. Having thus fully-described m'yinvention,

I c i 'new and desire to secure b Letters Patent is:

1. 'In a furnace, a furnace chamber, an'

arch comprising, angular end sections-seated in. the side {galls of the furnace chamber, each end section having an intcgral part thereof extending inwardly from the side wall, intermediate sections interlocked with the inwardly extending parts of the and sec tions, a blast pipe the ends of which are supported 1n the Sid. walls, the intermediate meased by said sections, and means for fastfilllllfl'tlltl end sections to the blast pipe, whereby the mtermediate sections areheld part of said blast pipe being substantially against sagging by the interlocking cngage I ment thereof with the supported end; see-Q" tip'ngi i- 2; In aboiler furnace, bridge'wall', a blast )ipe walls ofsaid grate chamber, said blastpipe being provided with rearwardly discharg ing blast exits'positioned in a' plane above the top. 'of said bridgewall, and an arch in a grate chamber, a

casing that part of the blast pipe which exl tends between the side walls,'said arch com prising end members and a plurality of other members pos t oned intermediate said" end members, sald end members being sup-.

1120.; supported in side ported in the side walls of the grate chamher and being attached to the blast pipe, the intermediate members ofthe arch being interlocked. to the end members.

3. In a boiler furnace, a grate chamber, a hridgewall the top surface of which slopes downwardly and forwardly, a blast pipe supported in side walls of the grate chamber, said blast pipe being positioned above the sloping surface of said bridgewall and in a plane intermediate the front and -thc rear surfaces thereof, said blast pipe being provided with blast outlets which lie in a plane above the top surfaceof the bridgewall, an arch incasing that part of the blast pipe which extends between the side walls, the end portions ofsaid arch being supported in the side walls of the grate eha1u-' bar, and means for rigidly fastening the arch and blastpipe together. said arch bclug positioned over the sloping surface of the laritflgcwall, so that the front surface of said arch substantially in the 'vertic: l lane of the front surface of the bridgewall, whereby the arch. produces a throat for the escape of products of con'ibustion, into the upper part of which throat a blast. is discharged "for producing a partial vacuum within said throat and for accelerating the flow of the escaping gases around the bottom face of the arch.

4. In a. boiler furnace, a, grate chamber, a.

' bridgewall, a'blast pipe supported in side walls of the grate chamber, said blast pipe,

being provided With rearwardly discharging exits positioned in a horizontal plane above the top surface of the bridgewall, and an archpositioned in the vertical plane of the l'n'idr cwall and incasing that part of said blast pipe which extends'betwecn the side walls, the bottom surface of the arch being: below the top surface of the bridgewall, said arch comprising end members and a plurality of intermediate members, said end mem bers beingsupportcd in the side walls of the grate chamber and being attached to the blast pipe, the intermediate arch members being interlocked to each other and to the end members. I

5. In a boiler furnace, a grate chamber, a bridgewalhaqhlast pipe supported in' side walls. of said grate chamber, said blastpipe having rearwardly discharging exits, and an arch incasing'that part'of said blast pipe whichextends between the side walls, said arch comprising end members each supported in'one side Wall of said grate cham-' her, a plurality of intermediate members, means for. interlocking the l ntermedrate members to each other and for interlock ng two of "said intermediate members to the end'mem'bers, and means for securing said arch members to the blast .pipe.

6; In a boiler-furnace, an.arch comprising right-angular end blocks each having the wider endthereof seated in the side walls of the furnace, other blocks intermediate the narrow cnds of said end blocks, all of said blocks having abutting engage ment on their-meeting end faces, and inter locking tongues and grooves in said abutting end faces of the blocks, intermediate the upper and lower faces-thereof, said tongues and grow-es extending at a right angle to the longitudinal axis of the arch, ton'ibined with a blast pipe supported in the side walls and having its intermediate part sul stantially incased by the members com posinp' said arch, said pipe being provided with blast outlets which discharge .rear wardly through the arch.

7. A furnace having seats in its side walls, an arch con'iposed of interlocked sections, the end sections occupying said seats of the side walls, a blast pipe supported at its ends by the side walls and having its in? termediate part substantially incased by said arcl1,-and means for fastening the end sections of the arch to the blast pipe. whereby the end sections are supported by the side walls and the blast pipe, and the sections intermediate said end sections are precluded from sagging by interlocking them with the end-sections.

8, In a furnace, a' bridge wall having a 95 curved breast, an arch in the vertical plane of said curved breast, a blast pipe iucased in said arch. and means for supplying air througrh'said curved breast, said curved breast having rows of blast outlets which 100 direct the blasts on converging lines, toward the arch, and across the throat be tween the arch and the bridge wall 9. In a furnace. a. bridgewvall having a curved breast provided with air supply 105 openings, an arch directly over said bridge all, thefront surface-of said arch being substantially in the Vertiralplane of the front edge of the breast, and a bltlsf' pdpe' adapt-ed to deliver a blast across the space 119 between the arch and the bridge wall, the

air supply openings from said breast directingthe inflowing' air on converging lines, toward the arch, and across the throat be-' tween said arch and the bridge wall.

' 10. In a furnace, a bridge wall, a concave breast on the front; side of said bridge wall, an arch s 'iringing from' the side walls-of the furnace 'Sld spaced relatively to the breast; to produce an upwardly extending throat, 120 the front face of the arch being substan tially in the vertical plane of the front edge .of said breast, and means for supplyinga blast. to said throat, said breast being provided with blastopenings which direct the infiowi'ng air on con-verging lines, toward the arch, and across the throatbetw een said;-

arch and the bridge Wall. i i

i 11. In a boiler furnace, a grate chamber,

a bridgewall, a blast. pipe sup'portcd'in the a blast-pipe supported in side walls of said grate chamber, said blast 'ipe being provided with rearwardly disc arging exits, a bridge wall having a blast chamber, said bridge wall being provided, als0,.with a .breast which is curved downwardly and forwardly', an arch positioned Qver'the breast and incasing that part of the blast pi e which extends between said sidewalls, tlie top surface of the bridgewall' being in a plane intermediate the plane of the bottom surface of the arch and the exits from the blast pipe, and rows of blast exits in the breast of said bridge wall, said blast exits being positioned to discharge jets or streams on eonvergii'ig lines and into a throat or flue which intervenes between the arch and the bridge wall.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' ORLAND D. ORVIS.

W'itn'esses:

H. I. Beam-mm), M. C. POWELL. 

